AU2009231088B2

AU2009231088B2 - Cable housing and method for receiving optical fibers and fibers of a fiber optic cable

Info

Publication number: AU2009231088B2
Application number: AU2009231088A
Authority: AU
Inventors: Scott David Lee
Original assignee: Tyco Electronics Service GmbH
Current assignee: Tyco Electronics Service GmbH
Priority date: 2008-04-02
Filing date: 2009-02-24
Publication date: 2014-06-26
Anticipated expiration: 2029-02-24
Also published as: AU2009231088A1; WO2009121453A1; US20110019967A1; US8606068B2

Abstract

The invention relates to a cable housing (1) for receiving optical fibers and fibers (28b) of a fiber optic cable (28a), comprising at least one locking element (15a, 15b) and at least one passage (16a, 16b) for the fibers (28b), wherein the locking element (15a, 15b) can be moved into at least one open and one closed state, wherein the fibers (28b) are held in the passage (16a, 16b) in the closed state, and a method for receiving optical fibers and fibers (28b) of a fiber optic cable (28a) in a cable housing (1), comprising the following process steps: a) disposing the locking element or elements (15a, 15b) in the open state; b) winding the fibers (28b) about the passage (16a, 16b); and c) disposing the locking element or elements (15a, 15b) in the closed state.

Description

-1 CABLE HOUSING AND METHOD FOR RECEIVING OPTICAL FIBERS AND FIBERS OF A FIBER OPTIC CABLE Field of Invention 5 The present invention relates to a cable housing device for holding optical fibers or fibers of an optical fiber cable; and a method for holding optical fibers or fibers of an optical fiber cable. For example, the present invention 10 relates to a cable housing and to a method for holding optical fibers or fibers of an optical fiber cable. Background of Invention 15 The process of binding together two ends of optical fibers is known as splicing, resulting in a "splice" being created between the two fibers. Splices are particularly susceptible to damage from shock, stress, dynamic loading and the like. Modern optical fiber networks can contain cables comprising 20 hundreds of optical fibers and a correspondingly large number of individual splices each of which needs to be protected against the aforementioned mechanical disturbances. 25 Housings such as splice trays, for the containment of optical fibers and cables, particularly in the vicinity of splices, for their protection against undesirable mechanical disturbances, are known. However, handling difficulties arise during the placement of new cables into such housings 30 with cables already placed therein. Further, devices used to retain cables within the housings tend to be obtrusive when placing cables onto the tray.

-lA It is generally desirable to overcome or ameliorate one or more of the above described difficulties, or to at least provide a useful alternative. 5 Summary of Invention According to the present invention, there is provided a cable housing device for holding optical fibers or fibers of an optical fiber cable, comprising: 10 a cable housing including at least one latch and at least one passageway for the fibers, wherein the latch can be moved at least to an open and a closed state, wherein, in use, the fibers are held in the passageway in the closed state; and 15 a removable top cover plate arranged to be coupled to the cable housing; wherein the cable housing has a mount which is arranged on a base of the cable housing, wherein the latch is attached to the mount and configured to slide along the 20 mount relative to the base, wherein the latch can be moved by sliding the latch along the mount transversely with respect to the passageway, and wherein the removable top cover plate encloses the latch and the mount within the cable housing such that the removable top cover plate 25 extends above the base in a longitudinal direction. According to the present invention, there is also provided a method for holding optical fibers or fibers of an optical fiber cable comprising: 30 (a) providing a cable housing having opposing sides extending between opposite ends, the cable housing including a base extending between the sides and ends, the cable housing also including a latch coupled to the base and

-IB

moveable between open and closed conditions relative to a passageway defined along the base, the cable housing including a removable top cover pate arranged to cover the cable housing; 5 (b) arranging said latch in said open condition by moving the latch parallel to the base; (c) winding the fibers around the passageway when the latch is in the open condition; (d) arranging said latch in said closed condition by 10 moving the latch parallel to the base to retain the fibers in the passageway; and e) coupling the removable top cover plate to the sides of the cable housing to enclose the latch within the cable housing, wherein the removable to cover late extends above 15 the base in a longitudinal direction. According to the present invention, there is also provided a cable housing device for holding optical fibers or fibers of an optical fiber cable, comprising: 20 a generally planar base having side walls and end walls, the base defining a passageway; a removable top cover plate arranged to be coupled to the cable housing device; a first curved inner wall extending upwardly from the 25 base, the first inner wall cooperating with a first of the end walls to define a securable region of the passageway; and at least one slideable latch coupled to the base, the slideable latch having a cover plate that extends towards 30 the first end wall, the slideable latch being configured to move between at least a first position and a second position, wherein the cover plate extends between the first -iC inner wall and the first end wall to cover the securable region of the passageway when the slideable latch is in the first position, and wherein the cover plate provides access to the securable region of the passageway when the slideable 5 latch is in the second position and wherein the removable top cover plate encloses the slideable latch within the cable housing such that the removable top cover plate extends above the base in a longitudinal direction. 10 According to the present invention, there is also provided a cable housing device for holding optical fibers or fibers of an optical fiber cable, comprising: a generally planar base having side walls and end walls, the base defining a passageway; 15 a first curved inner wall extending upwardly from the base, the first inner wall cooperating with a first of the end walls to define a securable region of the passageway; at least one slideable latch coupled to the base, the slideable latch having a cover plate that extends towards 20 the first end wall, the slideable latch being configured to move between at least a first position and a second position, wherein the cover plate extends between the first inner wall and the first end wall to cover the securable region of the passageway when the slideable latch is in the 25 first position, wherein the cover plate provides access to the securable region of the passageway when the slideable latch is in the second position, and wherein the slideable latch is slideably coupled to a mount that is fixedly coupled to the base; 30 a second curved inner wall extending upwardly from the base, the second inner wall cooperating with a second of the end walls to define a second securable region of the -1D passageway; and at least a second slideable latch coupled to the base between the slideable latch and the second curved inner wall, the second slideable latch having a second cover plate 5 that extends towards the second end wall, the second slideable latch being configured to move between at least a first position and a second position, wherein the second cover plate extends between the second inner wall and the second end wall to cover the second securable region of the 10 passageway when the second slideable latch is in the first position, and wherein the second cover plate provides access to the second securable region of the passageway when the second slideable latch is in the second position. 15 The invention is based on the technical problem of providing a cable housing and a method for holding optical fibers or fibers of an optical fiber cable, by means of which the handling of optical fibers and fibers is improved. 20 The technical problem is solved by the subjects with the features of claims 1 and 10. Further advantageous refinements of the invention are specified in the dependent claims.

WO 2009/121453 - 2 - PCT/EP2009/001304 For this purpose, the cable housing for holding optical fibers and fibers of an optical fiber cable has at least one latch and at least one passageway for the fibers, wherein 5 the latch can be moved at least to an open condition and a closed condition, or position, wherein the fibers are held in the passageway in the closed condition. The change from the open condition to the closed condition preferably takes place in this case by movement of the latch transversely 10 with respect to the passageway. In the open condition, the passageway represents an open channel, and in the closed condition it represents a closed channel, thus preventing undesirable movements of the fibers (for example upward) . In order to accommodate new fibers, the latch is then moved to 15 the open condition, the fibers are inserted, the latch is then moved back again to the closed condition. It should be noted that the wording "a least one latch" is also intended to cover just one latch, although the cable housing preferably has two latches. 20 In one preferred embodiment, the cable housing has a mount which is arranged on a base of the cable housing, wherein the latch is attached to the mount, and wherein the latch can be moved by means of a sliding movement along the mount 25 transversely with respect to the passageway. In a further preferred embodiment, the latch has a cover plate which, in the closed state, closes the passageway at the top. 30 In a further preferred embodiment, the latch has a connector for connection to the mount. In a further preferred embodiment, the connector has grooves 35 in the longitudinal direction and the mount has protrusions -3 in the longitudinal direction, which allows the latch to be held detachably in intermediate positions between the open state and the closed state. In this case, it should be noted that the individual groove does not extend in the 5 longitudinal direction, but that the grooves are arranged distributed in the longitudinal direction. Furthermore, it should be noted that, conversely, the connector may also have the protrusions, and the latch may have the grooves. 10 In one preferred embodiment, the passageway is bounded by a wall structure which projects from a base of the housing, wherein the wall structure comprises an inner wall and an outer wall, and wherein the inner wall is curved in order to guarantee a minimum bending radius for the fibers. 15 In a further preferred embodiment, the latch has a flange, which strikes against the inner wall in the closed state. The cable housing is preferably in the form of a splice cassette. 20 Brief Description of the Drawings Preferred embodiments of the present invention are hereafter described, by way of non-limiting example only, with 25 reference to the accompanying drawings, in which: Figure 1 is a an exploded view of a cable housing; Figure 2 is a perspective view of the housing shown in Figure 1; 30 Figure 3 is a top view of the housing shown in Figure 1; Figure 4 is a bottom view of the housing shown in Figure 2; Figure 5 is a perspective view of a latch of the housing -3A shown in Figure 1; and Figure 6 is a further top view of the housing shown in Figure 1. 5 Detailed Description of Preferred Embodiments of the Invention A cable housing 1 is shown in Figures 1 to 4 as including a WO 2009/121453 - 4 - PCT/EP2009/001304 substantially flat base 2 which defines a work area 3, extending between side regions 4a, 4b and ends 5a, 5b, adapted to retain cable thereon. 5 The housing 1 is provided with a number of anchoring sites 7 disposed at cable entry/exit regions 8, which may be used with cable ties (not shown), or similar, to secure cables entering and exiting the housing. 10 The housing 1 is further provided with integrally formed side rails 9a, 9b extending along side regions 4a, 4b of the work area 3. The rails 9a, 9b span substantially the length of, and are disposed along the edge of, the work area 3. Opposite ends sections 10 of each rail 9a, 9b converge 15 inwardly and merge into the anchoring sites 7. The side rails 9a, 9b are provided with notches 11 adapted to mate with clips of an adjacent housing (not shown), enabling adjacent housings to be stacked and secured relative to each other. The side rails 9a, 9b of the housing 1 are provided 20 with clips 12 (cf. Figure 2), at an underside 13 (cf. Figure 4), to engage in associated notches 11 of an adjacent housing. The side rails 9a, 9b are also provided with protruding lips 25 14 extending inwardly over the work area 3 of the housing 1. The protruding lips 14 assist in capturing optical fibers, for example, which may be looped around the work area 3, to the housing 1. 30 To further assist in securing the cable in place, the housing 1 is provided with latches 15a, 15b which are arranged to close off passageways 16a, 16b (cf. Figure 6), through which the fibers 28b pass. As particularly shown in Figure 5, each latch 15a, 15b is formed of an arcuate cover 35 plate 17, arranged substantially parallel to the work area 3 WO 2009/121453 - 5 - PCT/EP2009/001304 of the base 2, and an elongate connector 18 which is arranged to interfit with a mount 19 projecting upwardly from the base 2 of the housing 1. The connector 18 and mount 19 have a series of interfitting grooves 20 and protrusions 5 21 that allow the latch 15a, 15b to be releasably held at different positions along the length of the mount 19. A grip pad 22 is provided on the latch 15a, 15b to facilitate sliding movement of the connector 18 with respect 10 to the mount 19 between the different positions. Alternatively, the latch 15a, 15b could be lifted clear of the mount 19 and then moved to a new position and reconnected with the mount 19. 15 In the arrangement shown in Figure 6, a cable 28a is fastened to the anchoring site 7 by way of a cable tie (not shown) , for example. The latches 15a, 15b are in an open condition, which allows fibers 28b of the cable 28a to be looped around the curved inner walls 23 and under the lips 20 14. The lips 14 prevent the fibers 28b from lifting away from the base 2 and spilling over the side rails 9a, 9b. The fibers 28b are freely looped into the passageways 16a, 16b. Each passageway 16a, 16b is defined by wall structure 25 25a, 25b which projects from the base 2 of the housing 1 and which includes an inner wall 23, defining a minimum bend radius for fibers 28b passing through the passageway 16a, 16b, and outer wall 24. The outer wall 24 is located adjacent an end 5a, 5b of the housing 1, while the inner 30 wall 23 is positioned closer to a centre of the housing 1. As can be seen in Figure 6, the latches 15a, 15b have a relatively low profile relative to the base 2 and, additionally, are positioned inwardly of the wall structure 25a, 25b and away from a periphery of the housing 1, which 35 thereby allows the fibers 28b to be freely looped into the WO 2009/121453 - 6 - PCT/EP2009/001304 passageways 16a, 16b without obstruction. Once the fibers 28b have been arranged in the described manner, the ends of the individual fibers 28a are joined 5 together using optical fiber splicers (not shown). With the fibers 28b seated in the passageway 16a, for example, the latch 15a can be moved to close the passageway 16 by sliding the latch 15a along the mount 19 transversely 10 to the passageway 16a and parallel to the base 2 so that the cover plate 17 covers the passageway 16a to thereby secure the fibers 28b to the housing 1. The result is the arrangement shown in Figure 3. The cover plate 17 is also provided with a flange 26 which abuts the inner wall 23 when 15 the latch 15a is in the fully closed condition, in order to restrict further sliding movement of the latch 15a. The flange 26 includes protrusions 32a, 32b (cf. Figure 5) arranged for resilient engagement with corresponding notches 6a, 6b of the inner wall 23 to resiliently secure the latch 20 15a to the inner wall 23. The latch 15b is essentially a mirror image of the latch 15a and like reference numerals are used to denote like parts. As can be seen, the latch 15b is shown in the open condition 25 with the leading edge of the cover plate 17 abutting the inner wall 23 of the base 2 so that the passageway 16b is open to receive fibers 28b. The fibers from a second cable (not shown) are looped around 30 the curved walls 23 in an opposite direction to that of the fibers 28b of the first cable 28a so that the fibers would present themselves to the splices at opposite ends of the cable housing 1. 35 As may be appreciated from above, one particular advantage WO 2009/121453 - 7 - PCT/EP2009/001304 conveyed by the embodiments of the invention herein described, is that the latch 15a, 15b is slidably moveable between open, closed and semi-retracted conditions. The slidable movement removes the latch 15a, 15b from above the 5 passageway 16a, 16b, without it becoming an obstruction during the process of looping fibers 28b on or off the housing 1. Furthermore, the semi-retracted condition provides partial restraint for cable 28a and the fibers 28b already within the passageway 16a, 16b, whilst enabling 10 access for the addition of more cables 28a and fibers 28b thereto. Another advantage is provided by the inner walls 23. Due to the fragility of some cables 28a and fibers 28b, it is 15 desirable that there be protection for cables 28a and fibers 28b against bending below its minimum design bend radius. The inner wall 23, having a radius of curvature at least as large as the minimum bend radius of a cable or fiber placed thereagainst, should provide some protection for cable or 20 fiber being secured to the housing. The cable housing 1 also includes an outer cover plate 29 (cf. Figure 1) shaped to fit over the work area 3 of the body 2 to capture and protect the above-described components 25 within the housing 1. The outer cover plate 29 includes a planar body section 30 (cf. Figure 2) of corresponding dimensions to that of the work area 3. The outer cover plate 29 includes opposed rails 31 that extend outwardly from the body section 30 in common directions, along respective sides 30 of the plate 29. The rails 31 are shaped to fit over respective rails 9a, 9b when the cover plate 29 is coupled to the cable housing 1. The plate 29 includes protrusions (not shown) arranged for resilient engagement with corresponding notches 11 of the rails 9a, 9b to resiliently 35 secure the cover plate 29 to the cable housing 1.

WO 2009/121453 - 8 - PCT/EP2009/001304 The embodiments have been described by way of example only and modifications are possible within the scope of the invention. 5 Throughout this specification and claims which follow, unless the context requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or 10 step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. The reference in this specification to any prior publication (or information derived from it) , or to any matter which is 15 known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavor to which this specification relates.

WO 2009/121453 - 9 - PCT/EP2009/001304 List of References 1. cable housing 2. base 5 3. work area 4a. side region 4b. side region 5a. end 5b. end 10 6a. notch 6b. notch 7. anchoring sites 8. cable entry/exit regions 9a. side rail 15 9b. side rail 10. end sections 11. notches 12. clips 13. underside 20 14. lips 15a. latch 15b. latch 16a. passageway 16b. passageway 25 17. cover plate 18. connector 19. mount 20. grooves 21. protrusions 30 22. ribbing 23. inner wall 24. outer wall 25a. wall structure 25b. wall structure 35 26. flange 28a. cable 28b. fibers 29. outer cover plate 30. body section 40 31. side rails 32a. protrusion 32b. protrusion

Claims

1. A cable housing device for holding optical fibers or fibers of an optical fiber cable, comprising: 5 a cable housing including at least one latch and at least one passageway for the fibers, wherein the latch can be moved at least to an open and a closed state, wherein, in use, the fibers are held in the passageway in the closed state; and 10 a removable top cover plate arranged to be coupled to the cable housing; wherein the cable housing has a mount which is arranged on a base of the cable housing, wherein the latch is attached to the mount and configured to slide along the 15 mount relative to the base, wherein the latch can be moved by sliding the latch along the mount transversely with respect to the passageway, and wherein the removable top cover plate encloses the latch and the mount within the cable housing such that the removable top cover plate 20 extends above the base in a longitudinal direction.

2. The cable housing device as claimed in claim 1, wherein the latch has a cover plate, which closes the passageway at the top in the closed state. 25

3. The cable housing device as claimed in claim 1, wherein the latch has a connector for connection to the mount.

4. The cable housing device as claimed in claim 3, wherein 30 the connector has discrete grooves in the longitudinal direction and the mount has protrusions in the longitudinal direction, which allows the latch to be held detachably in -11 intermediate positions between the open and the closed state.

5. The cable housing device as claimed in claim 1, wherein 5 the passageway is bounded by a wall structure which projects from a base of the housing, wherein the wall structure comprises an inner wall and an outer wall, wherein the inner wall is curved in order to guarantee a minimum bending radius of the fibers. 10

6. The cable housing device as claimed in claim 5, wherein the wall structure is arranged on one end of the cable housing. 15

7. The cable housing device as claimed in claim 5, wherein the latch has a flange which strikes against the inner wall in the closed state.

8. The cable housing device as claimed in claim 1, wherein 20 the cable housing is in the form of a splice cassette.

9. A method for holding optical fibers or fibers of an optical fiber cable comprising: (a) providing a cable housing having opposing sides 25 extending between opposite ends, the cable housing including a base extending between the sides and ends, the cable housing also including a latch coupled to the base and moveable between open and closed conditions relative to a passageway defined along the base, the cable housing 30 including a removable top cover pate arranged to cover the cable housing; (b) arranging said latch in said open condition by -12 moving the latch parallel to the base; (c) winding the fibers around the passageway when the latch is in the open condition; (d) arranging said latch in said closed condition by 5 moving the latch parallel to the base to retain the fibers in the passageway; and e) coupling the removable top cover plate to the sides of the cable housing to enclose the latch within the cable housing, wherein the removable to cover late extends above 10 the base in a longitudinal direction.

10. The method of claim 9, wherein moving the latch comprises sliding the latch. 15

11. The method of claim 9, wherein arranging the latch in the open condition comprises moving the latch away from a nearest one of the ends of the housing; and wherein arranging the latch in the closed condition comprises moving the latch towards the nearest one of the ends of the 20 housing.

12. A cable housing device for holding optical fibers or fibers of an optical fiber cable, comprising: a generally planar base having side walls and end 25 walls, the base defining a passageway; a removable top cover plate arranged to be coupled to the cable housing device; a first curved inner wall extending upwardly from the base, the first inner wall cooperating with a first of the 30 end walls to define a securable region of the passageway; and at least one slideable latch coupled to the base, the flMhIUUfIeCIWOVCritu 'OrlDj\IJU> LU\ 1/3060_l dOC-20/03/20]4 -13 slideable latch having a cover plate that extends towards the first end wall, the slideable latch being configured to move between at least a first position and a second position, wherein the cover plate extends between the first 5 inner wall and the first end wall to cover the securable region of the passageway when the slideable latch is in the first position, and wherein the cover plate provides access to the securable region of the passageway when the slideable latch is in the second position and wherein the removable 10 top cover plate encloses the slideable latch within the cable housing such that the removable top cover plate extends above the base in a longitudinal direction.

13. The cable housing device as claimed in claim 12, 15 wherein the slideable latch has a flange that strikes against the first inner wall when the slideable latch is in the first position.

14. The cable housing device as claimed in claim 12, 20 wherein the slideable latch is slideably coupled to a mount that is fixedly coupled to the base.

15. The cable housing device as claimed in claim 14, wherein the at least one slideable latch is configured to be 25 held detachably in intermediate positions between the first and the second position.

16. The cable housing device as claimed in claim 14, wherein thecable housing device forms a splice cassette. 30

17. The cable housing device as claimed in claim 14, further comprising: uAuenoyemrNK'OrtblU)L\J LD\6275660_ I.doc-20/05/2014 -14 a second curved inner wall extending upwardly from the base, the second inner wall cooperating with a second of the end walls to define a second securable region of the passageway; and 5 at least a second slideable latch coupled to the base between the slideable latch and the second curved inner wall, the second slideable latch having a second cover plate that extends towards the second end wall, the second slideable latch being configured to move between at least a 10 first position and a second position, wherein the second cover plate extends between the second inner wall and the second end wall to cover the second securable region of the passageway when the second slideable latch is in the first position, and wherein the second cover plate provides access 15 to the second securable region of the passageway when the second slideable latch is in the second position.

18. A cable housing device for holding optical fibers or fibers of an optical fiber cable, comprising: 20 a generally planar base having side walls and end walls, the base defining a passageway; a first curved inner wall extending upwardly from the base, the first inner wall cooperating with a first of the end walls to define a securable region of the passageway; 25 at least one slideable latch coupled to the base, the slideable latch having a cover plate that extends towards the first end wall, the slideable latch being configured to move between at least a first position and a second position, wherein the cover plate extends between the first 30 inner wall and the first end wall to cover the securable region of the passageway when the slideable latch is in the first position, wherein the cover plate provides access to H:ilunerWoveNKflDIUJUCI LU6275660 I.doc-20/05/2014 -15 the securable region of the passageway when the slideable latch is in the second position, and wherein the slideable latch is slideably coupled to a mount that is fixedly coupled to the base; 5 a second curved inner wall extending upwardly from the base, the second inner wall cooperating with a second of the end walls to define a second securable region of the passageway; and at least a second slideable latch coupled to the base 10 between the slideable latch and the second curved inner wall, the second slideable latch having a second cover plate that extends towards the second end wall, the second slideable latch being configured to move between at least a first position and a second position, wherein the second 15 cover plate extends between the second inner wall and the second end wall to cover the second securable region of the passageway when the second slideable latch is in the first position, and wherein the second cover plate provides access to the second securable region of the passageway when the 20 second slideable latch is in the second position.

19. The cable housing device as claimed in claim 1, wherein the latch has a t-shape. 25

20. A cable housing device for holding optical fibers or fibers of an optical fiber cable, substantially as hereinbefore described with reference to the accompanying drawings. 30

21. A method for holding optical fibers or fibers of an optical fiber cable, substantially as hereinbefore described with reference to the accompanying drawings.